.button{
    -fx-border-color: #d9d9d9;
    -fx-border-width: 1;
    -fx-background-color: rgba(255,255,255,0.5);
    -fx-background-size: 20;
    -fx-background-repeat: no-repeat;
    -fx-background-position: center;
}
/*按钮悬浮*/
.button:hover{
    -fx-border-color: #70c0e7;
    -fx-border-width: 1;
    -fx-background-color: #e5f3fb;
}
.button:pressed{
    -fx-background-color: #cbe7f8;
}